package com.framework.core.text;

import java.io.UnsupportedEncodingException;

/**
 * 参数工具类
 * 
 * @author fangls .hxzntech
 * @date 2015-1
 * @version 1.0
 */
public class ParameterUtils {

	private static String encoding = "utf-8";

	public static String iso2UTF8(String value)
			throws UnsupportedEncodingException {
		return new String(value.getBytes("iso8859-1"), encoding);
	}

	public static String encode(String value) throws Exception {
		return str2HexStr(stringToUnicode(value));
	}

	public static String decode(String value) {
		return unicodeToString(hexStr2Str(value));
	}

	public static String stringToUnicode(String strText) throws Exception {
        char c;
        String strRet = "";
        int intAsc;
        String strHex;
        for (int i = 0; i < strText.length(); i++) {
            c = strText.charAt(i);
            intAsc = (int) c;
            strHex = Integer.toHexString(intAsc);
            if (intAsc > 128) {
                strRet += "\\u" + strHex;
            } else {
                // 低位在前面补00
                strRet += "\\u00" + strHex;
            }
        }
        return strRet;
    }
	
	public static String unicodeToString(String hex) {
        int t = hex.length() / 6;
        StringBuilder str = new StringBuilder();
        for (int i = 0; i < t; i++) {
            String s = hex.substring(i * 6, (i + 1) * 6);
            // 高位需要补上00再转
            String s1 = s.substring(2, 4) + "00";
            // 低位直接转
            String s2 = s.substring(4);
            // 将16进制的string转为int
            int n = Integer.valueOf(s1, 16) + Integer.valueOf(s2, 16);
            // 将int转换为字符
            char[] chars = Character.toChars(n);
            str.append(new String(chars));
        }
        return str.toString();
    }
	
	public static String str2HexStr(String str) { 
        char[] chars = "0123456789ABCDEF".toCharArray(); 
        StringBuilder sb = new StringBuilder("");
        byte[] bs = str.getBytes(); 
        int bit; 
        for (int i = 0; i < bs.length; i++) { 
            bit = (bs[i] & 0x0f0) >> 4; 
            sb.append(chars[bit]); 
            bit = bs[i] & 0x0f; 
            sb.append(chars[bit]); 
        } 
        return sb.toString(); 
    } 
     
    public static String hexStr2Str(String hexStr) { 
        String str = "0123456789ABCDEF"; 
        char[] hexs = hexStr.toCharArray(); 
        byte[] bytes = new byte[hexStr.length() / 2]; 
        int n; 
        for (int i = 0; i < bytes.length; i++) { 
            n = str.indexOf(hexs[2 * i]) * 16; 
            n += str.indexOf(hexs[2 * i + 1]); 
            bytes[i] = (byte) (n & 0xff); 
        } 
        return new String(bytes); 
    }
   
    public static String byte2HexStr(byte[] b) {
        String hs="";
        String stmp="";
        for (int n=0;n<b.length;n++) {
            stmp=(Integer.toHexString(b[n] & 0XFF));
            if (stmp.length()==1) hs=hs+"0"+stmp;
            else hs=hs+stmp;
            //if (n<b.length-1)  hs=hs+":";
        }
        return hs.toUpperCase();
    }
    private static byte uniteBytes(String src0, String src1) {
        byte b0 = Byte.decode("0x" + src0).byteValue();
        b0 = (byte) (b0 << 4);
        byte b1 = Byte.decode("0x" + src1).byteValue();
        byte ret = (byte) (b0 | b1);
        return ret;
    }
   
    public static byte[] hexStr2Bytes(String src) {
        int m=0,n=0;
        int l=src.length()/2;
        System.out.println(l);
        byte[] ret = new byte[l];
        for (int i = 0; i < l; i++) {
            m=i*2+1;
            n=m+1;
            ret[i] = uniteBytes(src.substring(i*2, m),src.substring(m,n));
        }
        return ret;
    }
	
	public static void main(String[] args) throws Exception{
		String a="中国";
		a=ParameterUtils.str2HexStr(a);
		System.out.println(a);
		a=ParameterUtils.hexStr2Str(a);
		System.out.println(a);
	}
}
